BUILT-UP FOUNDATION Russian patent published in 1995 - IPC

FIELD: erection of vertical supports. SUBSTANCE: foundation is made in the form of three-fin shaft with radial fins and cylindrical cap. End faces of the fins are joint to each other with concave cylindrical surfaces, gradually closing with each other in the area of end faces. Chord of arch of any cylindrical surface equals their radius and exceeds cap radius by a factor of 2 to 5. The cap is made in the form of a cylinder; end faces of fins are advisable to be made rectangular or trapezoidal, becoming wider near the cap. EFFECT: improved mounting. 3 cl, 5 dwg